How to determine what applications are running?

[ngcc]

I'd like to know how to determine what applications are running in the Windows using C#? And, how to determine which is the current? What function or API should be used?

[CPCericola]

I believe this would need to be done with the PlatformSDK using EnumProcesses. Here's a link to it.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/psapi_5kqb.asp

Best of luck!